arXiv 1508.030552015-08-12cond-mat.mtrl-sci

Li $_{0.9}$ Mo PDMATHAAB O $_{17}$中超晶格起源的扫描隧道显微镜观察

Origin of a Superlattice Observed in Li$_{0.9}$Mo$_{6}$O$_{17}$ by Scanning Tunneling Microscopy

Ling Fu, Aaron M. Kraft, Martha Greenblatt, M. C. Boyer

备注：: 14 pages, 4 figures
DOI：: 10.1103/PhysRevB.93.045430

摘要：

利用扫描隧道显微镜对锂紫青铜（Li $_{0.9}$ Mo $_{6}$ O $_{17}$）进行了室温下的研究。我们的测量使我们能够识别单晶解理面，并表明，它是可能的，以获得清洁的解理表面反映的晶体结构，而没有纳米级的表面无序的并发症。除了晶格之外，我们还观察到共存的不相称超晶格，波矢q = 0.5a* $\pm$ 0.25 b *。我们建议，超结构的起源是一个表面重建，这是驱动沿晶面，其中包含面内MoO $_{4}$四面体连接到面外MoO $_{6}$八面体通过角共享氧解理。当结合光谱测量，我们的研究显示了一个有前途的途径，通过它来研究复杂的物理在Li $_{0.9}$ Mo $_{6}$ O $_{17}$。

英文摘要：

We use scanning tunneling microscopy to study the lithium purple bronze (Li$_{0.9}$Mo$_{6}$O$_{17}$) at room temperature. Our measurements allow us to identify the single-crystal cleave plane and show that it is possible to obtain clean cleaved surfaces reflecting the crystal structure without the complications of nanoscale surface disorder. In addition to the crystal lattice, we observe a coexisting discommensurate superlattice with wavevectors q = 0.5a* $\pm$ 0.25b*. We propose that the origin of the superstructure is a surface reconstruction which is driven by cleaving along a crystal plane which contains in-plane MoO$_{4}$ tetrahedra connected to out-of-plane MoO$_{6}$ octahedra through corner-sharing oxygens. When combined with spectroscopic measurements, our studies show a promising avenue through which to study the complex physics within Li$_{0.9}$Mo$_{6}$O$_{17}$.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

相关论文